docs: def corner_text(
      text,
      distance=0.075,
      *,
      ax=None,
      corner="UL",
      factor=200,
      bbox=True,
      fontsize=18,
      background_alpha=1,
      edgecolor=None
  ):
      """Place some text in the corner of the figure.
  
      Parameters
      ----------
      text : str
          The text to use.
      distance : number (optional)
          Distance from the corner. Default is 0.05.
      ax : axis (optional)
          The axis object to label. If None, uses current axis. Default is None.
      corner : {'UL', 'LL', 'UR', 'LR'} (optional)
          The corner to label. Upper left, Lower left etc. Default is UL.
      factor : number (optional)
          Scaling factor. Default is 200.
      bbox : boolean (optional)
          Toggle bounding box. Default is True.
      fontsize : number (optional)
          Text fontsize. If None, uses the matplotlib default. Default is 18.
      background_alpha : number (optional)
          Opacity of background bounding box. Default is 1.
      edgecolor : string (optional)
          Frame edgecolor. Default is None (inherits from legend.edgecolor
          rcparam).
  
      Returns
      -------
      text
          The matplotlib text object.
      """
      # get axis
      if ax is None:
          ax = plt.gca()
      [h_scaled, v_scaled], [va, ha] = get_scaled_bounds(
          ax, corner, distance=distance, factor=factor
      )
      # get edgecolor
      if edgecolor is None:
          edgecolor = matplotlib.rcParams["legend.edgecolor"]
      # apply text
      props = dict(boxstyle="square", facecolor="white", alpha=background_alpha, edgecolor=edgecolor)
      args = [v_scaled, h_scaled, text]
      kwargs = {}
      kwargs["fontsize"] = fontsize
      kwargs["verticalalignment"] = va
      kwargs["horizontalalignment"] = ha
      if bbox:
          kwargs["bbox"] = props
      else:
          kwargs["path_effects"] = [PathEffects.withStroke(linewidth=3, foreground="w")]
      kwargs["transform"] = ax.transAxes
      if "zlabel" in ax.properties().keys():  # axis is 3D projection
          out = ax.text2D(*args, **kwargs)
      else:
          out = ax.text(*args, **kwargs)
      return out